Re: Duel CB Antennas
The advantage of duals is that if they're setup right, they'll talk and listen further fore & aft than any comparable single will.
The disadvantage of duals is that if they're not setup right, they'll work against each other, your talk & listen range will be reduced. Also, they don't tend to amplify the left-right direction near as much as the fore-aft direction. They don't reduce the lefr-right range, they just don't amplify it as much as the fore-aft.
If you know you'll always want to talk & listen primarily to the rear of your vehicle, mount the antenna on the front bumper. This gives maximum power & reception to the rear.
Mounting in the center of the vehicle gives the best range & reception for all directions.
I'm getting ready to yank my duals from the mirrors and put them behind the cab. Too much noise up front with the windows down.